In the 'evil rwby parallel universe fanfic', it could be that there is no Beacon Academy as we know it. Instead, there is a place where they train people to be evil enforcers. The relationships between the characters are also twisted. For example, Weiss might be in a power struggle with Ruby, constantly trying to undermine her to gain more control within their evil group. The world itself could be a darker version, with different kingdoms that are all in a state of constant war and strife.
One idea could be that in the parallel universe, the characters have different semblances. For example, Ruby could have a semblance that allows her to manipulate time instead of speed. Another idea is that the kingdoms have different relationships. Maybe Atlas and Vale are bitter enemies instead of allies. Also, the Grimm could be more intelligent and have the ability to form complex societies.
Sure. One popular 'rwby evil parallel universe fanfic' might be 'Dark Reflections'. It twists the characters' personalities in really unexpected ways. The heroes we know become anti - heroes or even villains, which is quite fascinating.
A prevalent theme is also the re - imagining of the power structure. In an evil parallel universe, the Dust and semblance powers might be used for evil purposes. For instance, Ruby's speed semblance could be used to quickly carry out heinous acts. Also, the theme of a corrupted Beacon Academy often comes up, where it becomes a breeding ground for evil instead of a place to train heroes.
The characters could also have different relationships with the Grimm. Instead of fighting them, they could be using the Grimm as tools. They might have some sort of ability to control or communicate with the Grimm. Their backstories would need to be adjusted accordingly. For example, Ruby might have had a traumatic experience that led her to turn evil, like losing someone she loved and blaming the world for it, which then made her decide to take over and reshape it in a more cruel way.
One idea could be a universe where Voldemort won the Battle of Hogwarts. The wizarding world would be in complete chaos and oppression. Harry could be in hiding, trying to find a way to fight back against Voldemort's regime. Another plot could be a world where the Sorting Hat makes different decisions for all the characters. For example, Hermione could be in Slytherin, which would completely change her relationships and the way she approaches magic. Or a parallel universe where magic is known to muggles and they co - exist in a very different way than in the original series.
One idea could be an evil Naruto using his shadow clones in new and devious ways in the RWBY universe. For example, he might send clones to disrupt the huntsmen training, causing chaos. Another could be Naruto teaming up with some of the villains in RWBY due to his newfound 'evil' nature, and together they plan to take over key locations in the RWBY world.
One possibility is that the relationships between the characters are altered. Weiss might find that in this parallel universe, she has a closer bond with someone she was not as close to in her own universe, like Blake. They would have to adapt to these new relationship dynamics while also trying to figure out how to get back to their own universe if that's their goal.
In some Naruto parallel universe fanfic, the shinobi villages could have different political systems. Maybe Konoha is a democratic system where every ninja has a vote in important matters. This would lead to a very different power dynamic within the village and how it interacts with other villages.
One idea could be exploring the origin story of the 'Master of the Universe'. Maybe he was an ordinary person who stumbled upon a powerful artifact that granted him his powers. Another could be a story where the Master of the Universe has to face a new, unexpected enemy that challenges his powers in ways he's never experienced before. For example, an enemy that can nullify his powers temporarily. A third idea is a 'what if' scenario, like what if the Master of the Universe lost his memory and had to rediscover his powers and purpose while being hunted by his former enemies.
One idea could be exploring a new character's journey in the RWBY world. Maybe a character from a different kingdom who has unique abilities and must team up with the main RWBY characters to face a new threat. Another plot could involve time travel, where a character goes back in time to change a crucial event in RWBY's history. A third idea is a story focused on the Grimm's origin and how to potentially find a way to permanently stop their creation.